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Efficiency Evaluation of Fully Integrated On-board EV Battery Chargers with Nine-Phase Machines

Levi, E and Bodo, N and Subotic, I and Espina, J and Empringham, L and Johnson, M (2017) Efficiency Evaluation of Fully Integrated On-board EV Battery Chargers with Nine-Phase Machines. IEEE TRANSACTIONS ON ENERGY CONVERSION, 32 (1). pp. 257-266. ISSN 0885-8969

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Abstract

A fully integrated on-board battery charger for future electric vehicles (EVs) has been recently introduced. It re-utilizes all the propulsion components of an EV in charging/vehicle-to-grid (V2G) modes, it does not require any additional components or hardware reconfiguration, and charging/V2G modes are realized with zero electromagnetic torque production. Both fast (three-phase) and slow (single-phase) charging are possible, with unity power factor operation at the grid side. The solution is based on the use of a triple three-phase machine and a nine-phase inverter/rectifier. This paper reports on the results of efficiency evaluation for the said system. Testing is performed using both a nine-phase induction machine and a nine-phase permanent magnet (PM) machine for a range of operating conditions in charging/V2G modes, with both three-phase and single-phase grid connection. Additionally, the impact of converter interleaving on the losses and efficiency is also studied. Losses are separated for different subsystems, thus providing an insight into the importance of optimization of different EV power train components from the efficiency point of view. Promising efficiencies, in the order of 90%, are achieved although none of the system components have been optimized.

Item Type: Article
Additional Information: (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Uncontrolled Keywords: 0906 Electrical And Electronic Engineering
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Electronics and Electrical Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date Deposited: 23 Aug 2016 08:32
Last Modified: 06 Sep 2017 18:25
DOI or Identification number: 10.1109/TEC.2016.2606657
URI: http://researchonline.ljmu.ac.uk/id/eprint/4043

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